Malicious PDF — malware analysis report

Static analysis result for SHA-256 a896863030ffce7a…

MALICIOUS

PDF

81.4 KB Created: 2021-03-22 07:02:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 0fe48eb4a7f66373df705ac269830f26 SHA-1: 5d989cc50d4f29aa1af130af1293cab692fd615b SHA-256: a896863030ffce7af15291dde7319fe65700b49f6ac63a889ea410189065bd6b
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a large number of external links, many hosted on disposable domains, indicating a link farm or phishing lure. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and heuristic firings point towards a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ponafet.ru/wix?keyword=wow+emerald+nightmare+guide PDF link annotation
    • https://jivarogogujuno.weebly.com/uploads/1/3/4/5/134513891/7db914f6e1aea7d.pdfIn PDF document text
    • https://dikijezirepa.weebly.com/uploads/1/3/2/8/132815872/41bd5.pdfIn PDF document text
    • https://terekutididir.weebly.com/uploads/1/3/0/9/130969195/9d1a29c1ce7a.pdfIn PDF document text
    • https://talupujepanuzan.weebly.com/uploads/1/3/4/5/134595677/wuromuxef_disud.pdfIn PDF document text
    • https://jodudetejad.weebly.com/uploads/1/3/0/7/130775984/nozatovoxadin-kanosisulab-diwakuw-tifamaro.pdfIn PDF document text
    • https://vuguzakinizole.weebly.com/uploads/1/3/4/4/134493236/wamapuv-karuduxili-balopir-mavarokiv.pdfIn PDF document text
    • https://duwifugikez.weebly.com/uploads/1/3/5/3/135351140/kugixokupel-pefefolidopom-babokof.pdfIn PDF document text
    • http://tanubujurutemut.scienceontheweb.net/analisi_logica_spiegazione.pdfIn PDF document text
    • https://guxitokos.weebly.com/uploads/1/3/2/6/132681611/a47757.pdfIn PDF document text
    • https://dukupifit.weebly.com/uploads/1/3/0/7/130775427/5b166c774616a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/431e4243-c612-48c8-bd5c-a7484c42071b/what_is_the_prophecy_in_his_dark_materials.pdfIn PDF document text
    • http://kuxubakelixuzot.atwebpages.com/adobe_premiere_pro_cs6_tutorial_effects.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa2b38dd-ed24-41ec-9161-b206b2139b86/naloruxutil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/755c2be8-ba63-44df-9d9a-ea3ff534fb9d/net_framework_interview_questions_and_answers_for_3_years_experience.pdfIn PDF document text
    • http://luxupuxud.myartsonline.com/david_ramsey_financial_planner.pdfIn PDF document text
    • http://wetukanezin.atwebpages.com/circular_linked_list_in_c.pdfIn PDF document text
    • http://xijejuvi.myartsonline.com/indoor_air_pollution_definition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba7bc12c-ac64-4077-8c14-a5dc023d2fec/full_symbols_list.pdfIn PDF document text
    • http://furunes.onlinewebshop.net/periodicity_of_periodic_table.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06a8e57a-d844-4bcf-9e4b-b9302f20ab40/vufajusate.pdfIn PDF document text
    • http://zisukuvi.atwebpages.com/la_dialectica_materialista.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21204231-231e-4d36-87d9-d9312f3c5180/zanib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a93ed4d-85f6-4b60-b283-ca22e4495787/charlie_and_the_chocolate_factory_movie_review_wikipedia.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f17c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF17C 5048 bytes
SHA-256: 60312d2c9e80a5d5724ee24dd292b67729671f8ce19498385218944357110eff
font_01_sfnt_off00010286.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10286 11060 bytes
SHA-256: c29d6209c4bb8509241a5606a07cbb4c5678414c39b3c0a7d36e410651b8a6d3
font_02_sfnt_off00012866.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12866 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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